My suggestion is that you try to achieve varied flow within the aquarium, as opposed to very strong flow.
I had a Seio 1500 in my 50 gallon and although it was more than enough power to blow things around, it was very focused and was too strong on corals directly in its path. If I were to alter the position then there would be dead spots. I opted to go with two smaller powerheads to give me the flexibility.
Seeing that you have two (powerful) powerheads to use, just give it a try. I would turn each powerhead down to its lowest flow and go from there. Your rockwork will also determine how much and what type of flow is necessary. Also, Seio powerheads are large and having two in a 35g might look cumbersome. Finally, finding the perfect flow in a empty tank (no corals) is great, but as soon as you start adding livestock, you'll most probably need to alter your powerhead positions and rockwork as well. It will be an iterative and experimental process.
Good luck.
|